From e405ab4bc6ff47d189d99c4d51aadf60a642d82a Mon Sep 17 00:00:00 2001 From: Gabriel Young Date: Sat, 18 Feb 2017 03:12:13 -0800 Subject: [PATCH] initial implementation of polyphony using variable length array of notes on --- quantum/process_keycode/process_midi.c | 199 ++++++++++++++++++++++++- quantum/process_keycode/process_midi.h | 3 + quantum/quantum_keycodes.h | 1 + tmk_core/protocol/lufa/lufa.c | 13 +- tmk_core/protocol/lufa/lufa.h | 2 +- 5 files changed, 211 insertions(+), 7 deletions(-) diff --git a/quantum/process_keycode/process_midi.c b/quantum/process_keycode/process_midi.c index 577dad43ac..bc48b39059 100644 --- a/quantum/process_keycode/process_midi.c +++ b/quantum/process_keycode/process_midi.c @@ -1,10 +1,204 @@ #include "process_midi.h" +#if 0 bool midi_activated = false; uint8_t midi_starting_note = 0x0C; int midi_offset = 7; +#endif -bool process_midi(uint16_t keycode, keyrecord_t *record) { +typedef union { + uint16_t raw; + struct { + uint8_t octave :4; + uint8_t velocity :4; + uint8_t channel :4; + }; +} midi_config_t; + +midi_config_t midi_config; + +#define MIDI_INVALID_NOTE 0xFF + +#if 0 +typedef struct { + uint64_t low; + uint64_t high; +} uint128_t; + +#if 0 +static void right_shift_uint128_t(uint128_t* val, uint8_t shift) +{ + uint64_t high_mask = ~0 >> (64 - shift); + uint64_t high_bits = (val->high & high_mask) << (64 - shift); + val->high = val->high >> shift; + val->low = (val->low >> shift) | high_bits; +} +#endif + +static uint64_t left_shift_uint64_t(uint64_t val, uint8_t shift) +{ + dprintf("left_shift_uint64_t(val, %c) ...\n", val, shift); + while (shift > 16u) { + dprintf(" left_shift_uint64_t: val=?, shift=%c\n", val, shift); + val <<= 16; + shift -= 16; + } + dprintf(" left_shift_uint64_t: val=?, shift=%c\n", val, shift); + val <<= shift; + return val; +} + +static void set_bit_uint128_t(uint128_t* val, uint8_t shift) +{ + uint64_t x = 1u; + + if (shift < 64) + { + x = left_shift_uint64_t(x, shift); + dprintf("x: %d\n", x); + dprintf("set_bit_uint128_t (%d): 0x%016X%016X\n", shift, 0, x); + val->low = val->low | left_shift_uint64_t(1u, shift); + } + else + { + x = left_shift_uint64_t(x, shift - 64); + dprintf("set_bit_uint128_t (%d): 0x%016X%016X\n", shift, x, 0); + val->high = val->high | left_shift_uint64_t(1u, shift - 64); + } +} + +static void clear_bit_uint128_t(uint128_t* val, uint8_t shift) +{ + if (shift < 64) + { + val->low = val->low & ~left_shift_uint64_t(1u, shift); + } + else + { + val->high = val->high & ~left_shift_uint64_t(1u, shift - 64); + } +} + +static bool is_bit_set_uint128_t(const uint128_t* val, uint8_t shift) +{ + if (shift < 64) + { + return !!(val->low & (1u << shift)); + } + else + { + return !!(val->high & (1u << (shift - 64))); + } +} + +uint128_t note_status = { 0, 0 }; +#endif + + +#define MIDI_MAX_NOTES_ON 10 + +typedef struct { + uint8_t note; + uint8_t tone; +} midi_notes_on_array_entry_t; + +typedef struct { + uint8_t length; + midi_notes_on_array_entry_t values[MIDI_MAX_NOTES_ON]; +} midi_notes_on_array_t; + +static midi_notes_on_array_t notes_on; + +inline uint8_t compute_velocity(uint8_t setting) +{ + return (setting + 1) * (128 / (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN + 1)); +} + +void midi_init(void) +{ + midi_config.octave = MI_OCT_0 - MIDI_OCTAVE_MIN; + midi_config.velocity = (MIDI_VELOCITY_MAX - MIDI_VELOCITY_MIN); + midi_config.channel = 0; + notes_on.length = 0; +} + +bool process_midi(uint16_t keycode, keyrecord_t *record) +{ + switch (keycode) { + case MIDI_TONE_MIN ... MIDI_TONE_MAX: + { + uint8_t channel = midi_config.channel; + uint8_t tone = keycode - MIDI_TONE_MIN; + uint8_t velocity = compute_velocity(midi_config.velocity); + if (record->event.pressed && notes_on.length < MIDI_MAX_NOTES_ON) { + uint8_t note = 12 * midi_config.octave + tone; + midi_send_noteon(&midi_device, channel, note, velocity); + dprintf("midi noteon channel:%d note:%d velocity:%d\n", channel, note, velocity); + notes_on.values[notes_on.length].note = note; + notes_on.values[notes_on.length].tone = tone; + notes_on.length++; + } + else { + for (uint8_t i = 0; i < notes_on.length; i++) { + uint8_t note = notes_on.values[i].note; + if (tone == notes_on.values[i].tone) { + midi_send_noteoff(&midi_device, channel, note, velocity); + dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity); + + for (uint8_t j=i; j < notes_on.length - 1; j++) + { + notes_on.values[j] = notes_on.values[j + 1]; + } + + notes_on.length--; + break; + } + } + } + return false; + } + case MIDI_OCTAVE_MIN ... MIDI_OCTAVE_MAX: + if (record->event.pressed) + midi_config.octave = keycode - MIDI_OCTAVE_MIN; + return false; + case MI_OCTD: + if (record->event.pressed && midi_config.octave > 0) + midi_config.octave--; + return false; + case MI_OCTU: + if (record->event.pressed && midi_config.octave < (MIDI_OCTAVE_MAX - MIDI_OCTAVE_MIN)) + midi_config.octave++; + return false; + case MIDI_VELOCITY_MIN ... MIDI_VELOCITY_MAX: + if (record->event.pressed) + midi_config.velocity = keycode - MIDI_VELOCITY_MIN; + return false; + case MI_VELD: + if (record->event.pressed && midi_config.velocity > 0) + midi_config.velocity--; + return false; + case MI_VELU: + if (record->event.pressed) + midi_config.velocity++; + return false; + case MIDI_CHANNEL_MIN ... MIDI_CHANNEL_MAX: + if (record->event.pressed) + midi_config.channel = keycode - MIDI_CHANNEL_MIN; + return false; + case MI_CHD: + if (record->event.pressed) + midi_config.channel--; + return false; + case MI_CHU: + if (record->event.pressed) + midi_config.channel++; + return false; + case MI_SUS: + //TODO + return false; + }; + +#if 0 if (keycode == MI_ON && record->event.pressed) { midi_activated = true; #ifdef AUDIO_ENABLE @@ -64,5 +258,6 @@ bool process_midi(uint16_t keycode, keyrecord_t *record) { if (keycode < 0xFF) // ignores all normal keycodes, but lets RAISE, LOWER, etc through return false; } - return true; +#endif + return true; } diff --git a/quantum/process_keycode/process_midi.h b/quantum/process_keycode/process_midi.h index acd4fc1b16..b0e0aeb832 100644 --- a/quantum/process_keycode/process_midi.h +++ b/quantum/process_keycode/process_midi.h @@ -2,6 +2,9 @@ #define PROCESS_MIDI_H #include "quantum.h" +#include "midi.h" + +void midi_init(void); bool process_midi(uint16_t keycode, keyrecord_t *record); diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h index 3728fa3664..a024a96395 100644 --- a/quantum/quantum_keycodes.h +++ b/quantum/quantum_keycodes.h @@ -189,6 +189,7 @@ enum quantum_keycodes { MI_VEL_1 = MIDI_VELOCITY_MIN, MI_VEL_2, MI_VEL_3, + MI_VEL_4, MI_VEL_5, MI_VEL_6, MI_VEL_7, diff --git a/tmk_core/protocol/lufa/lufa.c b/tmk_core/protocol/lufa/lufa.c index ba49284c9b..fb60658df7 100644 --- a/tmk_core/protocol/lufa/lufa.c +++ b/tmk_core/protocol/lufa/lufa.c @@ -1101,16 +1101,21 @@ void cc_callback(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t val); void sysex_callback(MidiDevice * device, uint16_t start, uint8_t length, uint8_t * data); + +void setup_midi(void) +{ + midi_init(); + midi_device_init(&midi_device); + midi_device_set_send_func(&midi_device, usb_send_func); + midi_device_set_pre_input_process_func(&midi_device, usb_get_midi); +} #endif int main(void) __attribute__ ((weak)); int main(void) { - #ifdef MIDI_ENABLE - midi_device_init(&midi_device); - midi_device_set_send_func(&midi_device, usb_send_func); - midi_device_set_pre_input_process_func(&midi_device, usb_get_midi); + setup_midi(); #endif setup_mcu(); diff --git a/tmk_core/protocol/lufa/lufa.h b/tmk_core/protocol/lufa/lufa.h index a049fd43c9..a515737862 100644 --- a/tmk_core/protocol/lufa/lufa.h +++ b/tmk_core/protocol/lufa/lufa.h @@ -49,7 +49,7 @@ #include #include "host.h" #ifdef MIDI_ENABLE - #include "midi.h" + #include "process_midi.h" #endif #ifdef __cplusplus extern "C" {